A 1.0 #regions in PPM
# low field   high field  bias        slope
  4.982629624501832  3.7906287666852903  -9486.0  -4.135498750720738  # for region 1
  4.973885644061537  3.7904062748056666  89556.0  -5.707704219899342  # for region 2
  4.972522188567003  4.750278942957893  85340.0  41.95468589083419  # for region 3
  4.91328885437954  4.751493724094193  6983.0  23.59039548022599  # for region 4
